/*
   * These are the public elements of the Linux kernel X.25 implementation.
   *
   * 	History
   *	mar/20/00	Daniela Squassoni Disabling/enabling of facilities 
   *					  negotiation.
   *	apr/02/05	Shaun Pereira Selective sub address matching with
   *					call user data
   */
  
  #ifndef	X25_KERNEL_H
  #define	X25_KERNEL_H
  
  #include <linux/types.h>
  #include <linux/socket.h>
  
  #define	SIOCX25GSUBSCRIP	(SIOCPROTOPRIVATE + 0)
  #define	SIOCX25SSUBSCRIP	(SIOCPROTOPRIVATE + 1)
  #define	SIOCX25GFACILITIES	(SIOCPROTOPRIVATE + 2)
  #define	SIOCX25SFACILITIES	(SIOCPROTOPRIVATE + 3)
  #define	SIOCX25GCALLUSERDATA	(SIOCPROTOPRIVATE + 4)
  #define	SIOCX25SCALLUSERDATA	(SIOCPROTOPRIVATE + 5)
  #define	SIOCX25GCAUSEDIAG	(SIOCPROTOPRIVATE + 6)
  #define SIOCX25SCUDMATCHLEN	(SIOCPROTOPRIVATE + 7)
  #define SIOCX25CALLACCPTAPPRV   (SIOCPROTOPRIVATE + 8)
  #define SIOCX25SENDCALLACCPT    (SIOCPROTOPRIVATE + 9)
  #define SIOCX25GDTEFACILITIES (SIOCPROTOPRIVATE + 10)
  #define SIOCX25SDTEFACILITIES (SIOCPROTOPRIVATE + 11)
  #define SIOCX25SCAUSEDIAG	(SIOCPROTOPRIVATE + 12)
  
  /*
   *	Values for {get,set}sockopt.
   */
  #define	X25_QBITINCL		1
  
  /*
   *	X.25 Packet Size values.
   */
  #define	X25_PS16		4
  #define	X25_PS32		5
  #define	X25_PS64		6
  #define	X25_PS128		7
  #define	X25_PS256		8
  #define	X25_PS512		9
  #define	X25_PS1024		10
  #define	X25_PS2048		11
  #define	X25_PS4096		12
  
  /*
   * An X.121 address, it is held as ASCII text, null terminated, up to 15
   * digits and a null terminator.
   */
  struct x25_address {
  	char x25_addr[16];
  };
  
  /*
   *	Linux X.25 Address structure, used for bind, and connect mostly.
   */
  struct sockaddr_x25 {
  	__kernel_sa_family_t sx25_family;	/* Must be AF_X25 */
  	struct x25_address sx25_addr;		/* X.121 Address */
  };
  
  /*
   *	DTE/DCE subscription options.
   *
   *      As this is missing lots of options, user should expect major
   *	changes of this structure in 2.5.x which might break compatibilty.
   *      The somewhat ugly dimension 200-sizeof() is needed to maintain
   *	backward compatibility.
   */
  struct x25_subscrip_struct {
  	char device[200-sizeof(unsigned long)];
  	unsigned long	global_facil_mask;	/* 0 to disable negotiation */
  	unsigned int	extended;
  };
  
  /* values for above global_facil_mask */
  
  #define	X25_MASK_REVERSE	0x01	
  #define	X25_MASK_THROUGHPUT	0x02
  #define	X25_MASK_PACKET_SIZE	0x04
  #define	X25_MASK_WINDOW_SIZE	0x08
  
  #define X25_MASK_CALLING_AE 0x10
  #define X25_MASK_CALLED_AE 0x20
  
  
  /*
   *	Routing table control structure.
   */
  struct x25_route_struct {
  	struct x25_address address;
  	unsigned int	   sigdigits;
  	char		   device[200];
  };
  
  /*
   *	Facilities structure.
   */
  struct x25_facilities {
  	unsigned int	winsize_in, winsize_out;
  	unsigned int	pacsize_in, pacsize_out;
  	unsigned int	throughput;
  	unsigned int	reverse;
  };
  
  /*
  * ITU DTE facilities
  * Only the called and calling address
  * extension are currently implemented.
  * The rest are in place to avoid the struct
  * changing size if someone needs them later
  */
  
  struct x25_dte_facilities {
  	__u16 delay_cumul;
  	__u16 delay_target;
  	__u16 delay_max;
  	__u8 min_throughput;
  	__u8 expedited;
  	__u8 calling_len;
  	__u8 called_len;
  	__u8 calling_ae[20];
  	__u8 called_ae[20];
  };
  
  /*
   *	Call User Data structure.
   */
  struct x25_calluserdata {
  	unsigned int	cudlength;
  	unsigned char	cuddata[128];
  };
  
  /*
   *	Call clearing Cause and Diagnostic structure.
   */
  struct x25_causediag {
  	unsigned char	cause;
  	unsigned char	diagnostic;
  };
  
  /*
   *	Further optional call user data match length selection
   */
  struct x25_subaddr {
  	unsigned int cudmatchlength;
  };
  
  #endif